The series, which sets its focus on a group of Chicago EMTs, received a 13-episode order for its second outing, the network announced Thursday.

The British import is produced by Fox Television Studios. Bob Fisher ("Wedding Crashers") serves as an executive producer alongside Leary, who previously tackled the firefighter world in a dramatic fashion over on FX's "Rescue Me," which ran from 2004 to 2011.

“'Sirens' resonated with a broad fan base, and we are excited to grow this new audience further, as Season 2 promises a lot more laughs and irreverent humor,” said USA Network President Chris McCumber in a statement. “We’re pleased to continue our partnership with Denis Leary and Bob Fisher, whose unique brand of witty, off-kilter and laugh-out-loud writing is brought to life by the immensely talented cast."

It comes as the network sets its sights on bolstering its comedy game following its acquisition of "Modern Family" repeats, which rolled out on the network in 2013. The network recently launched its second original comedy, "Playing House" from Jessica St. Clair and Lennon Parham -- whose ratings have been unimpressive. Next on deck is "Benched," starring Eliza Coupe.

A story about people who love one another made by people who clearly love one another, "Parks and Recreation" ended its seven-season, zigzag run through prime time Tuesday night on NBC. In the final shot, star Amy Poehler, as public servant Leslie Knope, faced the camera, all aglow, and...

The finale of "Parks and Recreation" aired on NBC on Tuesday night, and in a bold move, the show went further into the future than it already had in its final season, revealing what the public servants of Pawnee, Ind., would be doing decades from now.

Grammy Award-winner Patti LaBelle and Michael Sam, the NFL's first openly gay draft pick, are two of the 11 celebrities announced Tuesday as part of the upcoming 20th season of ABC's "Dancing With the Stars."